In 1956, Halls started making larger industrial buildings and gained substantial county council contracts for demountable classrooms. Halls became the largest single user of cedar in Britain, importing direct from Canada by the shipload. By the end of the sixties, Halls had their own fleet of sixty lorries!

The range of cedar wood sheds, garages and greenhouses was extended to include summerhouses and home extensions. In the late sixties they were selling 600 buildings a week and employed over 600 staff. In addition they were selling substantial quantities of industrial buildings.

In 1970 Halls acquired T Bath which had 25 established retail show sites and Worths Buildings Ltd which sold direct to retailers.

During 1972 to 1973 the price of cedar tripled on the world markets and this coupled with the oil crisis and recession in the UK, meant the cedar market reduced rapidly.